Description
Microsoft Internet Information Services (IIS), when used in conjunction with unspecified third-party upload applications, allows remote attackers to create empty files with arbitrary extensions via a filename containing an initial extension followed by a : (colon) and a safe extension, as demonstrated by an upload of a .asp:.jpg file that results in creation of an empty .asp file, related to support for the NTFS Alternate Data Streams (ADS) filename syntax. NOTE: it could be argued that this is a vulnerability in the third-party product, not IIS, because the third-party product should be applying its extension restrictions to the portion of the filename before the colon.
Published: 2009-12-29
Score: 6.0 Medium
EPSS: 10.1% Moderate
KEV: No
Impact: n/a
Action: n/a
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Microsoft Internet Information Services
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-07T07:01:20.343Z

Reserved: 2009-12-29T00:00:00.000Z

Link: CVE-2009-4445

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2009-12-29T21:00:24.453

Modified: 2026-04-23T00:35:47.467

Link: CVE-2009-4445

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses